Radiator cap



June 26, 1951 E. I lsorA 2,558,620

RADIATOR CAP Filed April 14, 1949 INVENTOR ATTORNEYS Patented June 261951 Wirte-STATES PATENT OFFICE RADIATOR CAP Edward Lisota, Patterson,Calif. Application April 14, 1949, Serial No. 87,513

1 Claim.

This invention is directed to, and it is an object to provide, animproved radiator cap for motor vehicles. v

' Another object of the invention is to provide a radiator cap whichpermits the radiator to be filled with water without removing the cap.

An additional object of the invention is to provide a radiator cap, asin the preceding paragraph, which is arranged to prevent the operator-upon lling the radiator-from being burned by contact with the hot capor by steam blowing back from the radiator when the water in the latteris boiling and steaming.

A further object of the invention is to provide a radiator cap,characterized as above, which is designed for ease and economy ofmanufacture.

A further object of the invention is to provide a practical and reliableradiator cap, and one which will be exceedingly effective for thepurpose for which it is designed.

These objects are accomplished by means of such structure and relativearrangement of parts as will fully appear by a perusal of the followingspecification and claim.

In the drawings:

Fig. 1 is an elevation of the cap detached.

Fig. 2 is an enlarged sectional elevation of the cap as in use and withthe valve in its normal closed position.

Fig. 3 is a similar view but shows the cap with the valve opened by awater feed nozzle for nlling the radiator,

Referring now more particularly to the characters of reference on thedrawings, the radiator cap is indicated generally at I, such capincluding, as usual, a depending peripheral coupling collar 2 adaptedfor releasable connection with the annular locking flange 3 on the upperend of the ller neck 4 of the radiator. A conventional sealing gasket Gis normally engaged between -the cap I and annular locking ange 3.

A vertical, tubular stem 5 extends in slidable relation centrallythrough the cap I, and through the central bore 6 of a rigid annularvalve seat 'l aflixed to the cap I mainly on the underside of the sameand in downwardly facing relation.

`At its lower or inner end the tubular stem 5 is formed with anenlarged, horizontal disc valve 8 having a gasket 9 on top thereof; suchdisc valve 8 normally abutting the annular valve seat 'I in closedrelation, as in Fig. 2.

The disc valve 8 is yieldably maintained in such normal closed positionby a loaded helical compression spring Ill which surrounds the tubularstem 5 between the top of the valve seat 1 and an enlarged radial flangeI I formed on the upper end of said stem 5.

An enlarged cylindrical head I2, of resilient material such asrelatively soft rubber, surrounds the upper portion of the stem 5, andthe radial ange II is embedded in such head intermediate the endsthereof.

The head I2 is funnel-like and includes a downwardly tapering hole I3which leads from the upper end of said head to communication with thebore of the stem 5.

Below the radial ange I I the head I2 is annularly recessed, as at I4,for the reception of the helical compression spring IU. Radiallyoutwardly of the spring IU the head I2 depends in the form of an annularskirt portion I5; the lower end of such skirt portion normally beingspaced a distance above the top of the cap I.

At its lower end, and immediately above the gasket 9, the stem 5 isformed with a plurality of laterally opening ports I6; such ports beingclosed by the annular valve seat 'l when the parts of the device are intheir normal positions, as in Fig. 2.

When it is desired to ll the radiator with water, a water feed nozzle,indicated diagrammatically at I 1, is engaged with a tight frictional ntin the tapered hole I3 of the head I2 and the nozzle I'l is then presseddownwardly causing the head I2 and the stem 5 to move downwardly. Withsuch movement the horizontal disc valve 8 moves down from the valve seatI to an open position, as in Fig. 3, wherein the ports I5 open into thefiller neck 4 of the radiator whereby water may then flow from thenozzle I l through stem 5 and out of ports IS into said ller neck 4.

It is thus possible to ll the radiator with water without the necessityof touching or removing the cap I. This is extremely advantageous in aninstance where the water in the radiator is initially low, boiling,andfsteaming; the device making it possible to fill the radiator withoutsubjecting the operator to possible burning by the steam. With thedescribed radiator cap it is impossible for steam to escape during thefilling operation; This is due to the fact that the nozzle I'I makes atight fit in the tapered hole I3 of the head I2, and additionally theannular depending skirt portion I5 of said head abuts the top of the capI during the lling operation. Such abutment of the skirt portion I5 withthe top of the cap I, as in Fig. 3, assures that no steam can escapealong the stem 5 and thence laterally outwardly above the cap.

The described radiator cap is a very practical and reliable device forthe intended purpose; the design of such cap being such that it can bemanufactured simply and economically.

From the foregoing description it will be readily seen that there hasbeen produced such a device as substantially fulfills the objects of theinvention as set forth herein.

While this specification sets forth in detail, the present and preferredconstruction of the device, still'v in practicesuch deviations from suchdetail may be resorted to as do not form a departure from the spirit ofthe invention, as dened by the appended claim.

Having thus described the invention, the following is claimed as new anduseful and upon which Letters Patent are desired:

In a radiator cap, an upstanding stem slidably extending through thecap, a horizontal disc valve on the lower end of the stem, a port in thestern directly above the disc valve, an annular valve seat` on the cap,a radial flange on the stern above the cap, a helical compression springsurrounding the stem below saidjradial flange and norma'lly butyieldably urging the stem upward toA close the valve against the seat,and a funnellike head of resilient material on the stem and incommunication therewith; the radial flange being embedded in said headand the latter being adapted to receive a water feed nozzle therein inclose tting relation; there being an annular depending skirt portion onthe head about the stem and spring, said skirt portion having a widerelatively fiat under surface, such surface being normally spaced abovethe cap but moving into face to face relation therewith uponvdownwardmotion of the stem caused by pressure of the nozzle on said head.

EDWARD LISOTA.

REFERENCES CITED The following references are of record in the le of'ythis patent:

UNITED STATES PATENTS Number Name Date 1,537,254 Mills Mayr 12, 19251,755,316 De Alcocer Apr; 22,1930

` 1,833,833 Ferrier ,Nov. 24', 1931 2,328,327 Cobb Augal, 194

